Sliding-door lock.



F. VITALI II G. PIZZOIIN-o.

SLIDING DOOR LOCK.

APPLIcATIoN FILED AUG.28. 1913.

Patented Jan. 4, 1916.`

2 SHEETS-SHEET I.

Figi

FRANOESCOVITALI AND GIOVANNI rIzzOItNO, or 'Oneri-ATE OLONA, ITALY. Y

" sLIDING-DOOB LOCK.

Speccation of Letters Patent.V ,VPateted Jan. 4, 1916; i

Appucation med August 2s, '1913. serial No. 787,068.

To all whom t mayl concern.'

Be it known that we, FRANCESCO VITALI and GIOVANNI PIZZORNO, both subjects of the King of Italy, residing at Olgiate Olona, Province of Milan, in the Kingdom of Italy, have invented certain new and useful Improvements in Sliding-Door Locks, of which the following is a specification.

`The present invention relates to a combined locking and sealing device for the doors of railway cars and the like which will aEord increased security and provide visible means whereby any illicit use thereof can be readily detected. Y

The invention is illustrated in the accompanying drawing wherein- Figure 1 is a side elevation of a car with its sliding door provided with the safety device embodying the present invention. Fig. 2 is a front view of the lock in the closed position with its front cover also closed after the sealing. Fig. 3 is a front view of the lock in the open position and Y cover,-the front plate and a portion of the door removed in order to show the internal structure of the device. Figs. 5 and 6 are transverse vertical sections on Vlines a-a.

and b-b of Fig. 4, respectively.

The door of the car is of the ordinary construction so that the present invention can be readily adapted to any kind of car actually in use. The latch or hasp 1 which is hinged so as to leave the door opening entirely free, is prevented from descending forward below the horizontal, by thel stop 2 provided on the door. The latch is provided with twoy teeth and a swelling or projection 3.

When shutting the door, the latch 1 enters the lock provided on the car and is engaged by means of its first tooth when it is desired to leave the door slightly open but the second or inner tooth is engaged when it is desired to completely close the door; the swelling 3 preventing in either case, the release of the latch by forcing an implement through the opening formed in the side of the lock and lifting or disengaging the latch, said opening having to be sufficiently deep Vfor the ingress and egress of the latch teeth or projections.

Within the lock, the latch 1 engages, the head or end of the arm 4 of the frame or means of a spring, 6,*this frame beingiguided 10 controlled by the spring 11, said latch being connected to the cover 12 ofthe lock.

tumbler 5V which is pressed lupward by y The latter has the shape of a frame, mountof springs 17 which are fixed on the lower part of the inner face of the plate 14 and act upon the said cover through little openings formed in the said plate. This plate 14 is bent inwardlyin order to increase its rigidity and to shield it against inclementl weather. It is formed with two apertures, the upper one 18 for the small latch 10 of the cover 12 and the central one 19 for the key which engages the spindle 20 pivoted at 21 upon the rear plate of the lock. Every station on the line will naturally have a key corresponding to this spindle. The latter is integral with follower 22 having a nose 23 acting on the frame for the purpose f of releasing the latch.r

The operation of the device is as follows z-For closing: By pushing the sliding door to the right (Fig. 1) the rst or the second tooth of the latch 1 will engage the end of the arm 4 of the frame 5 compressing the spring 6 which rises immediately the latch'is locked (Fig. 4). Upon the front plate 14 of the lock theA aforementioned cover is applied, which is of an appropriate kind of paper or the like having a suitable thickness, the names of the starting stations and termini, date and other useful indications being previously printed thereon. This cover which is held by the pins 16 of the plate 14, hides the hole 19vfor the key and, if the necessary aperture has not been formed, also hides the hole 18 of plate 14 for the small latch 10 of the cover 12, said latch 10 forming the necessary aperture and thus retains the said cover. Finally the cover the holes 15 of which engage the pins 16, is closed and prevents the openin of cover, engaging the'eXtension 9 of the frame 5 will also prevent the opening of the cover itself.

Vhat We claim and desire to secure by Letters Patent of the United States is A seal lock for cars comprising the combination of a latch on the door, With a lock including a spring controlled frame positively guided Within a casing and having two suitably shaped free ends which engage the latch of the door and the latch of a hinged cover, respectively, a cam adapted to move the frame, means for operating said cam, a key hole in said'casingvpins on said casing to receive a keyhole cover and pene- 15 trating holes in the cover substantially as described.

' In testimony whereof We aEX our signatures in presence of two Witnesses.

FRANCESCO VITALI. GIOVANNI PIZZORNO Witnesses: v

ROBERT I. BARKLEY, ERIC Dn NARE,

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

